CN116207590A - Narrow linewidth fiber laser capable of alternately emitting continuous wave and pulse wave - Google Patents
Narrow linewidth fiber laser capable of alternately emitting continuous wave and pulse wave Download PDFInfo
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- CN116207590A CN116207590A CN202211706081.8A CN202211706081A CN116207590A CN 116207590 A CN116207590 A CN 116207590A CN 202211706081 A CN202211706081 A CN 202211706081A CN 116207590 A CN116207590 A CN 116207590A
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- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
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- H01S3/06758—Tandem amplifiers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08086—Multiple-wavelength emission
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- H—ELECTRICITY
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- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
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Abstract
The invention discloses a narrow linewidth fiber laser for alternately transmitting continuous wave and pulse wave, which comprises: a narrow linewidth seed light source, a laser pre-amplifying unit, a continuous and pulse light switching unit and a laser power amplifying unit; the output end of the narrow linewidth seed light source is connected with the input end of the laser pre-amplifying unit through an optical fiber jumper, the output end of the laser pre-amplifying unit is respectively connected with the continuous light input end and the pulse light input end of the continuous and pulse light switching unit through a first beam splitter, the continuous light output end and the pulse light output end of the continuous and pulse light switching unit are coupled through a first coupler, the output end of the first coupler is connected with the input end of the laser power amplifying unit, and the output end of the laser power amplifying unit is connected with a large-mode-field optical fiber. The invention has compact structure, high reliability and low optical noise, can be applied to the fields of laser detection, laser radar, industrial detection, laser sensing and the like, and improves the detection precision and sensitivity.
Description
Technical Field
The invention belongs to the technical field of fiber lasers, and relates to a narrow linewidth fiber laser capable of alternately emitting continuous waves and pulse waves.
Background
A narrow linewidth fiber laser is a new type of laser developed in recent years. Compared with gas laser and solid laser, the narrow linewidth fiber laser has the advantages of narrow laser line width, high frequency stability, small volume, light weight, long service life and the like, and can realize laser output with high frequency stability. The narrow linewidth fiber laser has various internal modulation and external modulation technologies on the time domain modulation technology, and can realize the modulation output of pulse and continuous wave; the optical parameter modulation technology has a plurality of modulation modes such as frequency modulation, phase modulation, amplitude modulation, polarization modulation and the like.
The narrow linewidth fiber laser alternately emitting continuous wave and pulse wave is an all-fiber optical path, a semiconductor narrow linewidth laser is used as a narrow linewidth small signal light source, a preamplifier is injected to amplify small signals, and then a continuous and pulse light switching system is injected. The continuous and pulse optical switching system is composed of an optical switch and an optical modulator, and can realize continuous wave and pulse wave amplification optical path switching or simultaneous output under the electrical control. For an optical modulator, except for pulsed light that modulates a continuous wave into a desired parameter in the time domain; the device can be replaced by a frequency modulation device, a phase modulation device or a polarization modulation device, realizes modulation output of the frequency, the phase and the polarization state of output laser, simultaneously keeps the narrow linewidth of an injected light signal, and has great application potential in the aspects of laser radar, laser sensing, optical fiber communication, industrial monitoring and the like.
Disclosure of Invention
Object of the invention
The purpose of the invention is that: aiming at the defects of the prior art, the narrow linewidth fiber laser for alternately emitting continuous waves and pulse waves is provided, and because the continuous and pulse light switching system is provided with a plurality of continuous and pulse light path switching channels, the alternating/simultaneous output of continuous and pulse laser can be realized on one laser.
(II) technical scheme
In order to solve the above technical problems, the present invention provides a narrow linewidth fiber laser alternately emitting continuous waves and pulse waves, comprising: a narrow linewidth seed light source, a laser pre-amplifying unit, a continuous and pulse light switching unit and a laser power amplifying unit; the output end of the narrow linewidth seed light source is connected with the input end of the laser pre-amplifying unit through an optical fiber jumper, the output end of the laser pre-amplifying unit is respectively connected with the continuous light input end and the pulse light input end of the continuous and pulse light switching unit through a first beam splitter 6, the continuous light output end and the pulse light output end of the continuous and pulse light switching unit are coupled through a first coupler 11, the output end of the first coupler 11 is connected with the input end of the laser power amplifying unit, and the output end of the laser power amplifying unit is connected with a large-mode-field optical fiber 22..
The narrow linewidth seed light source comprises a narrow linewidth semiconductor laser 1, the narrow linewidth semiconductor laser 1 outputs seed laser with narrow linewidth and low noise under rated working voltage, and the seed laser is injected into a laser pre-amplifying unit through a single-mode output optical fiber.
The laser pre-amplification unit comprises a first pre-amplification driving and power control circuit, a first wavelength division multiplexer 2, a first pump laser source 3, a first gain optical fiber 4, a first filter and a first isolator 5; the first pre-amplification driving and power control circuit is connected with the pump laser source 3, the output end of the narrow linewidth semiconductor laser 1 is connected with the input end of the first wavelength division multiplexer 2, the output end of the first wavelength division multiplexer 2 is connected with the input end of the first gain optical fiber 4, the output end of the first pump laser source 3 is connected at the joint of the first wavelength division multiplexer 2 and the first gain optical fiber 4, the output end of the first gain optical fiber 4 is connected with the input end of the first filter, the output end of the first filter is connected with the input end of the first isolator 5, and the output end of the first isolator 5 is connected with the input end of the first beam splitter 6.
The first pre-amplification driving and power control circuit controls the first pump laser source 3 to output a set laser wavelength with stable power; the central wavelength of the laser output by the first pump laser source 3 is consistent with the central wavelength of the laser absorbed by the first gain fiber 4; the first gain optical fiber 4 absorbs the pumping energy output by the first pumping laser source 3, is excited by the seed laser signal of the narrow linewidth semiconductor laser 1 to complete radiation transition, and emits continuous laser with the same frequency, phase and polarization direction as those of the narrow linewidth seed laser and amplified by the optical power; the first wavelength division multiplexer 2 couples the pump light output by the first pump laser source 3 into the first gain optical fiber 4; the first filter completes optical filtering of continuous laser; the first isolator 5 completes the laser isolation in the first pump laser source 3, the first wavelength division multiplexer 2 and the first gain optical fiber 4, protects the first pump laser source 3 and the first wavelength division multiplexer 2, and simultaneously isolates the reflected light of the laser pre-amplifying unit and the continuous and pulse light switching unit, and protects the laser pre-amplifying unit.
The continuous and pulse light switching unit comprises a first optical switch 7, a second optical switch 8, a first optical modulator 9 and a second optical modulator 10, wherein the first optical switch 7 and the second optical switch 8 are connected in parallel, one end of each of the first optical switch 7, the first optical modulator 9 and the second optical modulator 10 is connected with the first beam splitter 6 in sequence, and the input end of the first coupler 11 is connected with the second optical modulator 10 and the second optical switch 8. The first optical switch 7 and the second optical switch 8 alternately inject continuous laser into the laser power amplifying unit, the first optical modulator 9 and the second optical modulator 10 complete pulse wave modulation of the continuous laser, and the continuous laser is injected into the laser power amplifying unit through a single-mode output optical fiber.
The laser power amplifying unit comprises a second driving and power control circuit, a third driving and power control circuit, a fourth driving and power control circuit, a second wavelength division multiplexer 12, a second pump laser source 13, a second gain optical fiber 14, a second filter 15, a second isolator 16, a beam combiner 19, a third pump laser source 17, a fourth pump laser source 18, a third gain optical fiber 20 and a third isolator 21; the input end of the second wavelength division multiplexer 12 is connected with the first coupler 11, the second wavelength division multiplexer 12, the second gain optical fiber 14, the second filter 15, the second isolator 16, the beam combiner 19, the third gain optical fiber 20 and the third isolator 21 are sequentially connected, the connection part of the second wavelength division multiplexer 12 and the second gain optical fiber 14 is connected with the output end of the second pump laser source 13, and the second pump laser source 13 is driven by a second driving and power control circuit; the input end of the beam combiner 19 is connected with a third pump laser source 17 and a fourth pump laser source 18, and the third pump laser source 17 and the fourth pump laser source 18 are correspondingly driven by a third driving and power control circuit and a fourth driving and power control circuit respectively.
Wherein the second driving and power control circuit controls the second pump laser source 13 to output a set laser wavelength with stable power; the center wavelength of the laser output by the second pump laser source 13 is consistent with the absorption wavelength of the second gain fiber 14; the second wavelength division multiplexer 12 couples the pump light output by the second pump laser source 13 into the second gain fiber 14; the second gain fiber 14 absorbs the pumping energy output by the second pumping laser source 13, and is excited by the continuous/pulse laser injected by the continuous and pulse optical switching system to complete radiation transition, and emits continuous/pulse laser with the same frequency, phase and polarization direction as the injected continuous/pulse laser and amplified optical power; the second filter 15 performs continuous/pulse laser filtering; the second isolator 16 is used for completing the laser isolation among the half second wavelength division multiplexer 12, the second pump laser source 13 and the second gain optical fiber 14, and the second pump laser source 13 and the second wavelength division multiplexer 12 are used for isolating the reflected light of the end face of the laser power amplification system and the output optical fiber and protecting the laser power amplification system; the beam combiner 19 combines the continuous/pulse laser beam with the pump light beams input from the third pump laser source 17 and the fourth pump laser source 18, and the combined laser beam is converged into the third gain optical fiber 20, and is output after the combined laser beam is isolated by the third isolator 21.
The narrow linewidth fiber laser capable of alternately emitting continuous waves and pulse waves further comprises a temperature control unit, wherein the temperature control unit comprises a temperature sensor, a TEC component, a cooling fan and a control circuit, the TEC component is used for keeping each pumping laser source at a stable working temperature, the cooling fan is used for cooling the whole laser in an air-cooling mode, the temperature sensor is used for collecting temperature values in real time, the control circuit is used for receiving temperature sensor data, automatically controlling the TEC component and the cooling fan to work, and keeping each optical element in a working temperature range.
(III) beneficial effects
The narrow linewidth fiber laser for alternately emitting continuous waves and pulse waves provided by the technical scheme provides a scheme for realizing the alternate emission and output of the continuous waves and the pulse waves on one laser, and can realize the rapid modulation of optical parameters such as power, repetition frequency, pulse width and the like on the same narrow linewidth light source so as to adapt to the requirements of different optical systems.
Drawings
Fig. 1 is a schematic optical path diagram of a narrow linewidth fiber laser alternately emitting continuous waves and pulse waves according to an embodiment of the present invention.
Detailed Description
To make the objects, contents and advantages of the present invention more apparent, the following detailed description of the present invention will be given with reference to the accompanying drawings and examples.
Referring to fig. 1, the narrow linewidth fiber laser alternately emitting continuous waves and pulse waves of the present embodiment includes: a narrow linewidth seed light source, a laser pre-amplifying unit, a continuous and pulse light switching unit and a laser power amplifying unit; the output end of the narrow linewidth seed light source is connected with the input end of the laser pre-amplifying unit through an optical fiber jumper, the output end of the laser pre-amplifying unit is respectively connected with the continuous light input end and the pulse light input end of the continuous and pulse light switching unit through a first beam splitter 6, the continuous light output end and the pulse light output end of the continuous and pulse light switching unit are coupled through a first coupler 11, the output end of the first coupler 11 is connected with the input end of the laser power amplifying unit, and the output end of the laser power amplifying unit is connected with a large-mode-field optical fiber 22.
The narrow linewidth seed light source comprises a narrow linewidth semiconductor laser 1, the narrow linewidth semiconductor laser 1 outputs seed laser with narrow linewidth and low noise under rated working voltage, and the seed laser is injected into a laser pre-amplifying unit through a single-mode output optical fiber.
The laser pre-amplification unit comprises a first pre-amplification driving and power control circuit, a first wavelength division multiplexer 2, a first pump laser source 3, a first gain optical fiber 4, a first filter and a first isolator 5; the first pre-amplification driving and power control circuit is connected with the pump laser source 3, the output end of the narrow linewidth semiconductor laser 1 is connected with the input end of the first wavelength division multiplexer 2, the output end of the first wavelength division multiplexer 2 is connected with the input end of the first gain optical fiber 4, the output end of the first pump laser source 3 is connected at the joint of the first wavelength division multiplexer 2 and the first gain optical fiber 4, the output end of the first gain optical fiber 4 is connected with the input end of the first filter, the output end of the first filter is connected with the input end of the first isolator 5, and the output end of the first isolator 5 is connected with the input end of the first beam splitter 6.
The first pre-amplification driving and power control circuit controls the first pump laser source 3 to output a set laser wavelength with stable power; the central wavelength of the laser output by the first pump laser source 3 is consistent with the central wavelength of the laser absorbed by the first gain fiber 4; the first gain optical fiber 4 absorbs the pumping energy output by the first pumping laser source 3, is excited by the seed laser signal of the narrow linewidth semiconductor laser 1 to complete radiation transition, and emits continuous laser with the same frequency, phase and polarization direction as those of the narrow linewidth seed laser and amplified by the optical power; the first wavelength division multiplexer 2 couples the pump light output by the first pump laser source 3 into the first gain optical fiber 4; the first filter completes optical filtering of continuous laser; the first isolator 5 completes the laser isolation in the first pump laser source 3, the first wavelength division multiplexer 2 and the first gain optical fiber 4, protects the first pump laser source 3 and the first wavelength division multiplexer 2, and simultaneously isolates the reflected light of the laser pre-amplifying unit and the continuous and pulse light switching unit, and protects the laser pre-amplifying unit.
The continuous and pulse light switching unit comprises a first optical switch 7, a second optical switch 8, a first optical modulator 9 and a second optical modulator 10, wherein the first optical switch 7 and the second optical switch 8 are connected in parallel, one end of each of the first optical switch 7, the first optical modulator 9 and the second optical modulator 10 is connected with the first beam splitter 6, the input end of the first coupler 11 is connected with the second optical modulator 10 and the second optical switch 8. The first optical switch 7 and the second optical switch 8 alternately inject continuous laser into the laser power amplifying unit, the first optical modulator 9 and the second optical modulator 10 complete pulse wave modulation of the continuous laser, and the continuous laser is injected into the laser power amplifying unit through a single-mode output optical fiber.
The laser power amplifying unit comprises a second driving and power control circuit, a third driving and power control circuit, a fourth driving and power control circuit, a second wavelength division multiplexer 12, a second pump laser source 13, a second gain optical fiber 14, a second filter 15, a second isolator 16, a beam combiner 19, a third pump laser source 17, a fourth pump laser source 18, a third gain optical fiber 20 and a third isolator 21; the input end of the second wavelength division multiplexer 12 is connected with the first coupler 11, the second wavelength division multiplexer 12, the second gain optical fiber 14, the second filter 15, the second isolator 16, the beam combiner 19, the third gain optical fiber 20 and the third isolator 21 are sequentially connected, the connection part of the second wavelength division multiplexer 12 and the second gain optical fiber 14 is connected with the output end of the second pump laser source 13, and the second pump laser source 13 is driven by a second driving and power control circuit; the input end of the beam combiner 19 is connected with a third pump laser source 17 and a fourth pump laser source 18, and the third pump laser source 17 and the fourth pump laser source 18 are correspondingly driven by a third driving and power control circuit and a fourth driving and power control circuit respectively.
The second driving and power control circuit controls the second pump laser source 13 to output a set laser wavelength of stable power; the center wavelength of the laser output by the second pump laser source 13 is consistent with the absorption wavelength of the second gain fiber 14; the second wavelength division multiplexer 12 couples the pump light output by the second pump laser source 13 into the second gain fiber 14; the second gain fiber 14 absorbs the pumping energy output by the second pumping laser source 13, and is excited by the continuous/pulse laser injected by the continuous and pulse optical switching system to complete radiation transition, and emits continuous/pulse laser with the same frequency, phase and polarization direction as the injected continuous/pulse laser and amplified optical power; the second filter 15 performs continuous/pulse laser filtering; the second isolator 16 is used for completing the laser isolation among the half second wavelength division multiplexer 12, the second pump laser source 13 and the second gain optical fiber 14, and the second pump laser source 13 and the second wavelength division multiplexer 12 are used for isolating the reflected light of the end face of the laser power amplification system and the output optical fiber and protecting the laser power amplification system; the beam combiner 19 combines the continuous/pulse laser beam with the pump light beams input from the third pump laser source 17 and the fourth pump laser source 18, and the combined laser beam is converged into the third gain optical fiber 20, and is output after the combined laser beam is isolated by the third isolator 21.
The narrow linewidth fiber laser alternately emitting continuous waves and pulse waves in the embodiment further comprises a temperature control unit for regulating and controlling the working temperature of the environment where each optical element is located.
The temperature control unit comprises a temperature sensor, a TEC component, a cooling fan and a control circuit, wherein the TEC component is used for keeping each pumping laser source at a stable working temperature, the cooling fan is used for cooling the whole laser in an air-cooling way, the temperature sensor is used for collecting temperature values in real time, the control circuit is used for receiving the temperature sensor data, automatically controlling the TEC component and the cooling fan to work, and keeping each optical element in a working temperature range.
In this embodiment, the output light wave form of the continuous and pulse light switching unit is: continuous wave, pulsed wave, continuous wave-pulsed wave mixing, pulsed wave-continuous wave mixing, or combinations of the above output forms.
The output light path of the continuous and pulse light switching unit is as follows: the continuous wave and the pulse wave, the continuous wave and the multi-path pulse wave, the multi-path continuous wave and the multi-path pulse wave are output simultaneously, alternately or alternately;
the optical switch adopted by the continuous and pulse light switching unit is as follows: mechanical optical switches, acousto-optic switches, electro-optic switches, magneto-optic switches, polarized optical switches, or a combination of two or more of the foregoing;
the optical modulator adopted by the continuous and pulse light switching unit is as follows: mechanical light modulator, acousto-optic modulator, electro-optic modulator, magneto-optic modulator, Q-switched crystal, absorption saturation crystal, or a combination of two or more of the foregoing.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (10)
1. A narrow linewidth fiber laser for alternately emitting a continuous wave and a pulse wave, comprising: a narrow linewidth seed light source, a laser pre-amplifying unit, a continuous and pulse light switching unit and a laser power amplifying unit; the output end of the narrow linewidth seed light source is connected with the input end of the laser pre-amplifying unit through an optical fiber jumper, the output end of the laser pre-amplifying unit is respectively connected with the continuous light input end and the pulse light input end of the continuous and pulse light switching unit through a first beam splitter (6), the continuous light output end and the pulse light output end of the continuous and pulse light switching unit are coupled through a first coupler (11), the output end of the first coupler (11) is connected with the input end of the laser power amplifying unit, and the output end of the laser power amplifying unit is connected with a large-mode-field optical fiber (22).
2. The narrow linewidth fiber laser of claim 1, wherein the narrow linewidth seed light source comprises a narrow linewidth semiconductor laser (1), the narrow linewidth semiconductor laser (1) outputs seed laser with narrow linewidth and low noise at rated operating voltage, and the seed laser is injected into the laser pre-amplifying unit through a single-mode output fiber.
3. The narrow linewidth fiber laser of alternating continuous wave and pulsed wave emission of claim 2, wherein the laser pre-amplification unit comprises a first pre-amplification drive and power control circuit, a first wavelength division multiplexer (2), a first pump laser source (3), a first gain fiber (4), a first filter, a first isolator (5); the first pre-amplification driving and power control circuit is connected with the pumping laser source (3), the output end of the narrow-linewidth semiconductor laser (1) is connected with the input end of the first wavelength division multiplexer (2), the output end of the first wavelength division multiplexer (2) is connected with the input end of the first gain optical fiber (4), the output end of the first pumping laser source (3) is connected at the joint of the first wavelength division multiplexer (2) and the first gain optical fiber (4), the output end of the first gain optical fiber (4) is connected with the input end of the first filter, the output end of the first filter is connected with the input end of the first isolator (5), and the output end of the first isolator (5) is connected with the input end of the first beam splitter (6).
4. A continuous wave and pulse wave alternately emitted narrow linewidth fiber laser as claimed in claim 3 wherein said first pre-amplification drive and power control circuit controls the first pump laser source (3) to output a set laser wavelength of stabilized power; the central wavelength of the laser output by the first pump laser source (3) is consistent with the central wavelength of the laser absorbed by the first gain fiber (4); the first gain fiber (4) absorbs the pumping energy output by the first pumping laser source (3), is excited by the seed laser signal of the narrow linewidth semiconductor laser (1) to complete radiation transition, and emits continuous laser with the same frequency, phase and polarization direction as the narrow linewidth seed laser and amplified by the optical power; the first wavelength division multiplexer (2) couples the pump light output by the first pump laser source (3) into the first gain optical fiber (4); the first filter completes optical filtering of continuous laser; the first isolator (5) is used for completing laser isolation in the first pump laser source (3), the first wavelength division multiplexer (2) and the first gain optical fiber (4), protecting the first pump laser source (3) and the first wavelength division multiplexer (2), isolating reflected light of the laser pre-amplifying unit and the continuous and pulse light switching unit, and protecting the laser pre-amplifying unit.
5. The narrow linewidth fiber laser of claim 4, wherein the continuous wave and pulse wave alternately emitting, the continuous and pulse light switching unit comprises a first optical switch (7), a second optical switch (8), a first optical modulator (9) and a second optical modulator (10), the first optical switch (7) and the second optical switch (8) are connected in parallel, one end of each optical switch is connected with the first beam splitter (6), the first optical switch (7), the first optical modulator (9) and the second optical modulator (10) are sequentially connected, and the input end of the first coupler (11) is connected with the second optical modulator (10) and the second optical switch (8). The first optical switch (7) and the second optical switch (8) alternately inject continuous laser into the laser power amplifying unit, the first optical modulator (9) and the second optical modulator (10) complete pulse wave modulation of the continuous laser, and the continuous laser is injected into the laser power amplifying unit through a single-mode output optical fiber.
6. The narrow linewidth fiber laser of claim 5 wherein the laser power amplification unit comprises a second drive and power control circuit, a third drive and power control circuit, a fourth drive and power control circuit, a second wavelength division multiplexer (12), a second pump laser source (13), a second gain fiber (14), a second filter (15), a second isolator (16), a combiner (19), a third pump laser source (17), a fourth pump laser source (18), a third gain fiber (20), and a third isolator (21); the input end of the second wavelength division multiplexer (12) is connected with the first coupler (11), the second wavelength division multiplexer (12), the second gain optical fiber (14), the second filter (15), the second isolator (16), the beam combiner (19), the third gain optical fiber (20) and the third isolator (21) are sequentially connected, the connection part of the second wavelength division multiplexer (12) and the second gain optical fiber (14) is connected with the output end of the second pump laser source (13), and the second pump laser source (13) is driven by a second driving and power control circuit; the input end of the beam combiner (19) is connected with a third pump laser source (17) and a fourth pump laser source (18), and the third pump laser source (17) and the fourth pump laser source (18) are correspondingly driven by a third driving and power control circuit and a fourth driving and power control circuit respectively.
7. A continuous wave and pulse wave alternately emitted narrow linewidth fiber laser as claimed in claim 6 wherein said second drive and power control circuit controls the second pump laser source (13) to output a set laser wavelength of stabilized power; the center wavelength of the laser output by the second pump laser source (13) is consistent with the absorption wavelength of the second gain optical fiber (14); the second wavelength division multiplexer (12) couples the pumping light output by the second pumping laser source (13) into the second gain optical fiber (14); the second gain fiber (14) absorbs the pumping energy output by the second pumping laser source (13), and the continuous/pulse laser injected by the continuous and pulse light switching system excites to complete radiation transition, and emits continuous/pulse laser with the same frequency, phase and polarization direction as the injected continuous/pulse laser and amplified optical power; a second filter (15) performs continuous/pulsed laser filtering; the second isolator (16) is used for completing the laser isolation among the half second wavelength division multiplexer (12), the second pump laser source (13) and the second gain optical fiber (14), and the second pump laser source (13) and the second wavelength division multiplexer (12) are used for isolating the reflected light of the end faces of the laser power amplifying system and the output optical fiber and protecting the laser power amplifying system; the beam combiner (19) combines the continuous/pulse laser beams with the pump light beams input by the third pump laser source (17) and the fourth pump laser source (18), and the combined laser beams are converged into the third gain optical fiber (20) and output after being separated by the third isolator (21).
8. The narrow linewidth fiber laser alternately emitting continuous wave and pulse wave according to claim 7, further comprising a temperature control unit, wherein the temperature control unit comprises a temperature sensor, a TEC component, a cooling fan and a control circuit, the TEC component keeps each pumping laser source at a stable working temperature, the cooling fan cools the whole laser in an air cooling way, the temperature sensor collects temperature values in real time, the control circuit receives temperature sensor data, and the TEC component and the cooling fan are automatically controlled to work to keep each optical element in a working temperature range.
9. The narrow linewidth fiber laser of claim 8 wherein the continuous wave and pulsed wave alternately emitted, optical switch employed by the continuous and pulsed light switching unit is: mechanical optical switches, acousto-optic switches, electro-optic switches, magneto-optic switches, polarized optical switches, or a combination of two or more of the foregoing.
10. The narrow linewidth fiber laser of claim 9 wherein the continuous wave and pulsed wave alternately emitted, wherein the optical modulator employed by the continuous and pulsed optical switching unit is: mechanical light modulator, acousto-optic modulator, electro-optic modulator, magneto-optic modulator, Q-switched crystal, absorption saturation crystal, or a combination of two or more of the foregoing.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116879869A (en) * | 2023-09-06 | 2023-10-13 | 青岛镭测创芯科技有限公司 | Laser radar control method and device, electronic equipment and medium |
| CN117872659A (en) * | 2024-03-12 | 2024-04-12 | 北京盛镭科技有限公司 | Laser amplifying device and laser amplifying method |
-
2022
- 2022-12-29 CN CN202211706081.8A patent/CN116207590A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116879869A (en) * | 2023-09-06 | 2023-10-13 | 青岛镭测创芯科技有限公司 | Laser radar control method and device, electronic equipment and medium |
| CN116879869B (en) * | 2023-09-06 | 2024-01-19 | 青岛镭测创芯科技有限公司 | Laser radar control method and device, electronic equipment and medium |
| CN117872659A (en) * | 2024-03-12 | 2024-04-12 | 北京盛镭科技有限公司 | Laser amplifying device and laser amplifying method |
| CN117872659B (en) * | 2024-03-12 | 2024-05-07 | 北京盛镭科技有限公司 | Laser amplifying device and laser amplifying method |
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